Why is desertification a serious environmental concern? it destroys mineral resources, it creates unhealthy air pollution. scientists cannot explain its causes so it cannot be stoppit makes usable land too dry for farming or habitation.

Desertification occurs when a relatively dry area of land becomes a desert, typically losing its bodies of water as well as vegetation and wildlife. This means that it makes usable land too dry for farming or habitation. So the answer is D.

I hope this Helps! :)

your answer would be (a)

c, they united with once